STS 1657/1656 Series

Battery Element Tester

STS 1657/1656 Series

Battery Element Tester

STS 1657 and 1656 Battery Element Testers quickly and reliably detect insulation defects in lead-acid batteries, including missing or damaged separators—before filling or charging. Using a high-voltage, short-duration pulse, these testers stress the battery’s dielectric material without generating harmful heat, ensuring accurate fault detection while protecting the cell. These battery elementers are the go to selection because of its reliability, accuracy, and ease of use.

Why Choose STS 1657/1656 Series

Industry Leader

STS Instruments is the go to choice for battery fault detection, selected by battery manufacturers worldwide

Reliable & Durable

Solid-state switching and robust design support high-volume production environments with consistent performance

Safe Testing

High-voltage, short-duration pulses stress the dielectric without generating damaging heat, unlike traditional AC tests

Simple, Go/No-Go Operation

Clear displays, automatic audible/visual alarms make testing fast and easy—no interpretation needed

Key Specifications

  • Designed for early, quick and accurate fault detection on high volume production lines
  • Adjustable voltage for any battery up to 3,000V
  • Ideal for testing wide range of separator types and spacing
  • Unique Short Duration Pulse Method
  • Produces rapid Go/No-Go Results for faster throughput
  • Safe, efficient, easy-to-use safety probes for applying high voltage
  • Lockout Feature shuts off high voltage if product fails
  • Large Color LCD Display for high voltage output and test results
  • Easy menu-driven operation
  • Solid State design for durability in high volume product testing
  • Audible and visual failure indicators
  • Auto-Line Option for automated in-line production test

Detect Lead Acid Battery Defects Fast

Unique Short Duration Pulse Method

STS Battery Element Testers catch insulation faults—like missing or damaged separators—early, protecting your lead-acid batteries before filling or charging. Using a high-voltage, short-duration pulse, they deliver fast, reliable testing without heat damage.

With adjustable voltages up to 3,000V, simple go/no-go operation, and instant audible and visual alerts, STS testers make high-volume production safer, faster, and more efficient.

Auto-Line Option for Automated In-Line Production Test

The Auto-Line option enables fully automated in-line testing of lead-acid batteries, integrating seamlessly into your production workflow. Batteries are tested automatically as they reach the tester, with no manual probe connection or operator intervention required. Instant go/no-go results are provided via audible and visual alarms, and test data can be logged directly for quality tracking and reporting.

Designed for high-volume production, the Auto-Line option ensures consistent, reliable fault detection while maximizing throughput and efficiency.

STS 1656
Model NumberDescriptionNotes
Standard Models
1656-PLCBattery Element Tester (BET) Supplied with:
• USB Interface, PLC I/O
• Set of High Voltage Safety Test Leads, 1.8 m / 6 ft. long
• 1656 Operator Manual and Owners Manual
• Spare AC Input Fuses (2)
• Certificate of Calibration
• AC Line Cord (detachable)
1656-PLC-232BET with RS232 Serial Interface• Adds RS232 Interface in addition to USB
1656-PLC-485BET with RS485 Serial Interface• Adds RS485 multi-drop Interface in addition to USB
1656-PLC-RPCBET with Rear Panell HV Connect• Provides rear panel mounted test probe connections
Auto Line Unit
1656 AUTO LINESix Channel HV Multiplexer for auto-production line fixture testing.Requires 1656-PLC-RPC
Supplied with:
• Auto Line Operator Manual
• AC Line Cord (detachable)
1652 Compatibility Options
1656-PLC-TTAdds TT1652 OptionModifies PLC Test Input to emulate 1652 Trigger mode. See TT1652 Datasheet for details.
1656-PLC-070BET with Model 070 Adapter attached to top coverDesigned to replace 1652-070 field units. Attaches 995-017-907B module adapter to 1656-PLC-TT BET
Type 070 AdapterP/N 995-017-907B for use with 1656-PLC-TTConverts 115Vac to isolated low level PLC Test input signal and provides 115Vac Test Fail output. May be ordered separately. Requires 1656-PLC-TT BET to operate. See Type 070 Datasheet for details.
Accessories (P/N)
102-050-919Test Probe Assembly KitSet of Safety Retracting Red & Black Probes with 1.8 m / 6 ft. leads
200025Test Probe Assembly, RedSafety Retracting Probe, Red with 1.8 m / 6 ft. lead
200026Test Probe Assembly, BlackSafety Retracting Probe, Black with 1.8 m / 6 ft. lead
200386Test Probe Assembly, RedSafety Retracting Probe, Red with 3 m / 10 ft. lead
200387Test Probe Assembly, BlackSafety Retracting Probe, Black with 3 m / 10 ft. lead
STS 1657
Model NumberDescriptionNotes
Standard Models
1657-PLCBattery Element Tester (BET)Supplied with:
• USB Interface, PLC I/O
• Set of High Voltage Safety Test Leads, 1.8 m / 6 ft. long
• 1656 Operator Manual and Owners Manual
• Spare AC Input Fuses (2)
• Certificate of Calibration
• AC Line Cord (detachable)
1657-PLC-232BET with RS232 Serial Interface• Adds RS232 Interface in addition to USB
1657-PLC-485BET with RS485 Serial Interface• Adds RS485 multi-drop Interface in addition to USB
1657-PLC-RPCBET with Rear Panell HV Connect• Provides rear panel mounted test probe connections
Auto Line Unit
1656 AUTO LINESix Channel HV Multiplexer for auto-production line fixture testing.Requires 1657-PLC-RPC
Supplied with:
• Auto Line Operator Manual
• AC Line Cord (detachable)
1652 Compatibility Options
1657-PLC-TTAdds TT1652 OptionModifies PLC Test Input to emulate 1652 Trigger mode. See TT1652 Datasheet for details.
1657-PLC-070BET with Model 070 Adapter attached to top coverDesigned to replace 1652-070 field units. Attaches 995-017-907B module adapter to 1657-PLC-TT BET
Type 070 AdapterP/N 995-017-907B for use with 1657-PLC-TTConverts 115Vac to isolated low level PLC Test input signal and provides 115Vac Test Fail output. May be ordered separately. Requires 1657-PLC-TT BET to operate. See Type 070 Datasheet for details.
Accessories (P/N)
102-050-919Test Probe Assembly KitSet of Safety Retracting Red & Black Probes with 1.8 m / 6 ft. leads
200025Test Probe Assembly, RedSafety Retracting Probe, Red with 1.8 m / 6 ft. lead
200026Test Probe Assembly, BlackSafety Retracting Probe, Black with 1.8 m / 6 ft. lead
200386Test Probe Assembly, RedSafety Retracting Probe, Red with 3 m / 10 ft. lead
200387Test Probe Assembly, BlackSafety Retracting Probe, Black with 3 m / 10 ft. lead

Why Choose STS 1657/1656 Series

Industry Leader

STS Instruments is the go to choice for battery fault detection, selected by battery manufacturers worldwide

Reliable & Durable

Solid-state switching and robust design support high-volume production environments with consistent performance

Safe Testing

High-voltage, short-duration pulses stress the dielectric without generating damaging heat, unlike traditional AC tests

Simple, Go/No-Go Operation

Clear displays, automatic audible/visual alarms make testing fast and easy—no interpretation needed

Key Specifications

  • Designed for early, quick and accurate fault detection on high volume production lines
  • Adjustable voltage for any battery up to 3,000V
  • Ideal for testing wide range of separator types and spacing
  • Unique Short Duration Pulse Method
  • Produces rapid Go/No-Go Results for faster throughput
  • Safe, efficient, easy-to-use safety probes for applying high voltage
  • Lockout Feature shuts off high voltage if product fails
  • Large Color LCD Display for high voltage output and test results
  • Easy menu-driven operation
  • Solid State design for durability in high volume product testing
  • Audible and visual failure indicators
  • Auto-Line Option for automated in-line production test

Detect Lead Acid Battery Defects Fast

Unique Short Duration Pulse Method

STS Battery Element Testers catch insulation faults—like missing or damaged separators—early, protecting your lead-acid batteries before filling or charging. Using a high-voltage, short-duration pulse, they deliver fast, reliable testing without heat damage.

With adjustable voltages up to 3,000V, simple go/no-go operation, and instant audible and visual alerts, STS testers make high-volume production safer, faster, and more efficient.

Auto-Line Option for Automated In-Line Production Test

The Auto-Line option enables fully automated in-line testing of lead-acid batteries, integrating seamlessly into your production workflow. Batteries are tested automatically as they reach the tester, with no manual probe connection or operator intervention required. Instant go/no-go results are provided via audible and visual alarms, and test data can be logged directly for quality tracking and reporting.

Designed for high-volume production, the Auto-Line option ensures consistent, reliable fault detection while maximizing throughput and efficiency.

STS 1656
Model NumberDescriptionNotes
Standard Models
1656-PLCBattery Element Tester (BET) Supplied with:
• USB Interface, PLC I/O
• Set of High Voltage Safety Test Leads, 1.8 m / 6 ft. long
• 1656 Operator Manual and Owners Manual
• Spare AC Input Fuses (2)
• Certificate of Calibration
• AC Line Cord (detachable)
1656-PLC-232BET with RS232 Serial Interface• Adds RS232 Interface in addition to USB
1656-PLC-485BET with RS485 Serial Interface• Adds RS485 multi-drop Interface in addition to USB
1656-PLC-RPCBET with Rear Panell HV Connect• Provides rear panel mounted test probe connections
Auto Line Unit
1656 AUTO LINESix Channel HV Multiplexer for auto-production line fixture testing.Requires 1656-PLC-RPC
Supplied with:
• Auto Line Operator Manual
• AC Line Cord (detachable)
1652 Compatibility Options
1656-PLC-TTAdds TT1652 OptionModifies PLC Test Input to emulate 1652 Trigger mode. See TT1652 Datasheet for details.
1656-PLC-070BET with Model 070 Adapter attached to top coverDesigned to replace 1652-070 field units. Attaches 995-017-907B module adapter to 1656-PLC-TT BET
Type 070 AdapterP/N 995-017-907B for use with 1656-PLC-TTConverts 115Vac to isolated low level PLC Test input signal and provides 115Vac Test Fail output. May be ordered separately. Requires 1656-PLC-TT BET to operate. See Type 070 Datasheet for details.
Accessories (P/N)
102-050-919Test Probe Assembly KitSet of Safety Retracting Red & Black Probes with 1.8 m / 6 ft. leads
200025Test Probe Assembly, RedSafety Retracting Probe, Red with 1.8 m / 6 ft. lead
200026Test Probe Assembly, BlackSafety Retracting Probe, Black with 1.8 m / 6 ft. lead
200386Test Probe Assembly, RedSafety Retracting Probe, Red with 3 m / 10 ft. lead
200387Test Probe Assembly, BlackSafety Retracting Probe, Black with 3 m / 10 ft. lead
STS 1657
Model NumberDescriptionNotes
Standard Models
1657-PLCBattery Element Tester (BET)Supplied with:
• USB Interface, PLC I/O
• Set of High Voltage Safety Test Leads, 1.8 m / 6 ft. long
• 1656 Operator Manual and Owners Manual
• Spare AC Input Fuses (2)
• Certificate of Calibration
• AC Line Cord (detachable)
1657-PLC-232BET with RS232 Serial Interface• Adds RS232 Interface in addition to USB
1657-PLC-485BET with RS485 Serial Interface• Adds RS485 multi-drop Interface in addition to USB
1657-PLC-RPCBET with Rear Panell HV Connect• Provides rear panel mounted test probe connections
Auto Line Unit
1656 AUTO LINESix Channel HV Multiplexer for auto-production line fixture testing.Requires 1657-PLC-RPC
Supplied with:
• Auto Line Operator Manual
• AC Line Cord (detachable)
1652 Compatibility Options
1657-PLC-TTAdds TT1652 OptionModifies PLC Test Input to emulate 1652 Trigger mode. See TT1652 Datasheet for details.
1657-PLC-070BET with Model 070 Adapter attached to top coverDesigned to replace 1652-070 field units. Attaches 995-017-907B module adapter to 1657-PLC-TT BET
Type 070 AdapterP/N 995-017-907B for use with 1657-PLC-TTConverts 115Vac to isolated low level PLC Test input signal and provides 115Vac Test Fail output. May be ordered separately. Requires 1657-PLC-TT BET to operate. See Type 070 Datasheet for details.
Accessories (P/N)
102-050-919Test Probe Assembly KitSet of Safety Retracting Red & Black Probes with 1.8 m / 6 ft. leads
200025Test Probe Assembly, RedSafety Retracting Probe, Red with 1.8 m / 6 ft. lead
200026Test Probe Assembly, BlackSafety Retracting Probe, Black with 1.8 m / 6 ft. lead
200386Test Probe Assembly, RedSafety Retracting Probe, Red with 3 m / 10 ft. lead
200387Test Probe Assembly, BlackSafety Retracting Probe, Black with 3 m / 10 ft. lead