Monroe Electronics Resistivity Meter - model 291 - Manual

Resistivity Meter Model 291
P/N 0910310
The resistivity Meter Model 291 measures both surface resistivity and resistance to ground, allowing simple
repeatable measurements of conductive, static dissipative and insulative surfaces.
Specifications:
Range: 10 3 to 10 12 
Accuracy::  ½ decade on a logarithmic scale
Test Voltage:
Test Voltage Range Standard
10 V <10 3 – 10 5  IEC 61340-4-1
100 V <10 6 – 10 12  IEC 61340-4-1
Probes: Internal parallel probe
Jacks for external probes (internal probes are switched off when using external
probes.)
Power Supply: Battery operated with 9V alkaline battery
Complies with CE
Checking surface resistivity ( )
Hold the meter away from any surface and press the test button, the insulative red LED should light.
Place the meter onto any surface that requires testing, again press the test button and hold. The LED
that illuminates constantly is the decade measured.
< < 1 k  Green LED
10 3 1 k  Green LED
10 4
10 k  Green LED
10 5 100k  Green LED
10 6 1 M  Yellow LED
10 7
10 M  Yellow LED
10 8
100 M  Yellow LED
10 9 1 G  Yellow LED
10 10
10 G  Yellow LED
10 11
100 G  Yellow LED
10 12
1 T  Red LED
> insulative Red LED
green = conductive yellow = dissipative red = insulative
Checking resistance to ground ( ): When one of the sockets of the external probes is grounded the
measured decade it the resistance to ground.
100 Housel Ave  PO Box 535 Lyndonville NY 14098 1-800-821-6001 585-765-2254  fax: 585-765-9330 monroe-electronics.com