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 | Pin-type meters |
| 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.
Tell us which meter you are checking and we will confirm the right device before you order.
Tell us which meter you run and we will confirm the right accessory before you order.
