Tramex calibration check box for MRH series meters
A reference box for confirming that an MRH series meter is reading correctly.
Fitment
- Tramex MRH series meters, including the MRH3
Check before the job, not after the dispute
A calibration check takes a minute and produces a fact you can point to. It is worth doing at the start of any job whose readings will support an invoice, a certificate or a decision to lay flooring — and worth recording that you did it.
Related checks: the CM series check plate for concrete moisture meters, the ME5 check box for the Moisture Encounter range, and the SAL75 salt check for Hygro-i2 relative humidity probes.
Why check, and when
These instruments do not drift dramatically – they drift quietly. A meter that has been dropped, left in a hot vehicle, or simply worked hard for a couple of years can read consistently and still read wrong, and nothing on the display tells you. A check before a job whose readings go into a report, an insurance claim or a compliance certificate costs a minute and protects the reading you are prepared to sign your name to.
A check box confirms the meter reads correctly. It is not a calibration adjustment – if a meter fails its check, it needs to go back for service.
Which calibration check suits which meter
| Check device | For |
| CALBOXME5 check box | ME5 Moisture Encounter |
| CALBOXSMM5 check box | SMM5 Skipper 5 |
| MRH series check box | MRH series, including MRH3 |
| CALCRH check plate | CM series concrete meters – CME5, CMEX5 |
| Calibration check plugs, set of 3 | Probe ports on the CMEX2 and MRH3 |
| SAL75 75% salt check | Hygro-i2 relative humidity probes |
Impedance meters and RH probes are checked differently. An impedance meter is verified against a reference box or plate of known value; an RH probe is verified in a sealed salt chamber at a known humidity. One does not substitute for the other, and a meter that takes RH probes needs both.
Not sure which check device suits your meter? Tell Carpet Cleaners Warehouse the model and we will confirm before you order.
