Press the HOLD button to freeze the reading on the screen. This is helpful if you need to measure in a tight space where the screen isn't visible.
Your FMX-002 must be calibrated annually to maintain accuracy (specified as ±5% of reading, ±2 digits). The provides two options:
| Icon / Reading | Meaning | |---|---| | ±000 | Zero point, no measurable field | | 0.00 to 1.49 | Low range (Volts, displayed as kV) – actually 0 to ±1490V | | 1.0 to 20.0 | High range (kV) – ±1000V to ±20000V | | HOLD | Display locked, press again to release | | BAT | Low battery; replace soon | | OVR | Over-range: field exceeds ±20kV (move farther away) |