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ISOMETER® isoHR1685DW–925

ISOMETER® isoHR1685DW–925

  • Insulation monitoring device for mobile, insulated elevating work platforms
  • Protection when working on overhead lines under voltage
  • Continuous insulation monitoring during operation
  • Storage of data for verification of insulation condition
  • Graphical representation of the insulation resistance over time (isoGraph)

The ISOMETER® isoHR1685DW-925 is designed for insulation monitoring on elevating work platforms/overhead catenary vehicles. Voltages of up to 1500 V make working on live overhead lines for local transport vehicles particularly hazardous. To protect operatives, overhead catenary vehicles are equipped with 2 insulation levels. Pollution, ageing or damage to these insulation levels can cause the current to be perceptible to people and presents an electrocution hazard.

The isoHR1685DW-925 makes a valuable contribution to improving the safety of work carried out on live systems of this kind.

The device is installed in the vehicle, where it continuously monitors the insulation level and notifies operatives immediately whenever defined insulation levels drop below defined thresholds during the approach, and both before and during maintenance work. Both insulation levels can be monitored.


  • ISOMETER® for mobile, insulated elevating work platforms
  • Continuous monitoring of both insulation levels on elevating work platforms, also during operation
  • Storage of data for verification of insulation condition. Where necessary, provision of documentary verification following a
  • electrical accident
  • Graphical representation of the insulation resistance over time (isoGraph)
  • RS-485 interface with BMS protocol and Modbus RTU for forwarding data, alarms and acknowledgements via existing communication to work platform
  • History memory with real-time clock (13-day buffer) for storing 1023 alarm messages with date and timestamp
  • Freely programmable digital inputs
  • Automatic device self-test with automatic message in the event of a fault
  • Connection monitoring
  • Separately adjustable response values Ran1 (alarm 1) and Ran2 (alarm 2) for prewarning and alarm
  • High-resolution graphic LC display, for excellent readability and recording of the device status
  • Measurement of high-resistance insulation faults 100 kΩ…20 GΩ
  • Automatic adjustment to high system leakage capacitances


  • Insulation monitoring device for mobile, insulated elevating work platforms

ISOMETER® isoHR1685DW–925 Variante/i

TypeSupply voltage*Response value rangeNominal system voltageArt. No.
isoHR1685DW-925DC 18…30 V100 kΩ…100 MΩAC 0…1000 V, DC 0…1500 VB91065806W

* Absolute values

Download per ISOMETER® isoHR1685DW–925

Dichiarazioni di conformità CE isoXX1685 124.6 KB 2022/08/12 06:17:2512.08.2022 06:17:25
Data sheet isoHR1685DW-925 439.1 KB DE2021/05/28 07:02:4428.05.2021 07:02:44D00369
Data sheet isoHR1685DW-925 436.6 KB EN2021/05/28 07:02:5028.05.2021 07:02:50D00369
Manuali di istruzioni isoHR1685DW-925 5.6 MB DE2021/05/20 11:49:4920.05.2021 11:49:49D00369
Manuali di istruzioni isoHR1685DW-925 5.9 MB EN2021/05/28 07:03:1328.05.2021 07:03:13D00369
Data sheet isoHR1685DW-925 438.5 KB FR2021/05/28 07:02:5928.05.2021 07:02:59D00369
Data sheet isoHR1685DW-925 439.1 KB ES2021/05/28 07:02:5528.05.2021 07:02:55D00369
Flyer Na, kribbelt`s Ihnen auch in den Fingern? (isoHR1685) 3.0 MB DE2019/05/13 10:31:3713.05.2019 10:31:37D00369
Flyer Do you also have a tingling sensation in your fingers? (isoHR1685) 3.0 MB EN2019/05/13 10:31:3813.05.2019 10:31:38D00369
Flyer ¿También usted siente hormigueo en los dedos? (isoHR1685) 2.0 MB ES2018/04/16 06:12:5216.04.2018 06:12:52D00369
Quickstarts isoHR1685DW-925 1.2 MB DE2021/02/18 15:27:4818.02.2021 15:27:48D00369
Quickstarts isoHR1685DW-925 1.2 MB EN2021/02/18 15:27:4818.02.2021 15:27:48D00369
Software iso1685 Set V2.1 48.1 KB 2019/05/13 10:31:5913.05.2019 10:31:59