Safe electrical working requires the use of a voltage indicator that has been proven with a suitable proving device. With the introduction of four new products, Martindale now has the widest range of proving units available for use with 230V, 440V and 690V voltage indicators. One model also includes a Calcheck function for verifying resistance range calibration on installation and insulation testers.
Choosing a
proving device
The six Martindale proving units offer solutions for a wide range of applications, but which one is right for you? Follow our simple flowchart to find out…
Range features include
Suitable for use on
230V, 440V & 690V
AC & DC
Stepped voltage
Overmoulded case
Low profile
Magnetic hanger
Auto off
High / low Z
Installation tester
Calcheck
Find out more about our proving devices
Martindale 230V AC / DC
proving device
PD230SRD
Martindale 440V AC
proving device
PD440S
Martindale 440V AC
proving device
PD440SX
Martindale 440V AC / DC
proving device
PD440SRD
Martindale 440V AC / DC
proving device
PD440SRDX
Martindale 690V AC
proving device
PD690S
Martindale 690V AC / DC
proving device
PD690SRD
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