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Error displays and troubleshooting – Electro-Chemical Devices (ECD) L20 User Manual

Page 15

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Error Displays and troubleshooting

Main

Display

Possible Causes

Corrective

Actions

“Er1”

● “Stand” was pressed before

the electrode and ATC/Temp

probe settled to within +/-

1.5 pH of the buffer value.

●pH electrode offset is greater

/ less than +/-1.5 pH.

●pH electrode is faulty.

●Press “Clear” key, allow

sufficient time for the

electrode and ATC/Temp

probe to stabilize, re-press

“Stand” key to start the

calibration procedure.

●Replace the buffer and /or

the pH electrode. Press

“Clear” key to recalibrate

meter.

●Replace electrode.

“Er2”

● “Slope” was pressed before

the electrode and

ATC/Temp probe settled to

within 30% of the buffer

value.

● Buffer 4.00, 4.01, 9.18 and

10.01 is not correct.

●pH electrode slope is off by

more than 30% of ideal

slope.

●Allow sufficient time for the

electrode and ATC/Temp

probe to stabilize, re-press

“Slope” key to continue the

calibration procedure.

●Check if the correct buffer is

used.

●Replace the buffer and /or

the pH electrode. Press

“Clear” key to recalibrate

meter.

“Er3”

Temperature is out of the

0.0 to 60.0°C range.

Bring the buffer temperature

within range.

“Over”

Or

“Undr”

●Measured pH is out of the

2.00 to 16.00 pH range.

●Measured mV is out of the

1999 to 1999 mV range.

●Measured temperature is out

of the –10.0 to 120.0°C

range.

●Bring sample pH into the

correct measuring range.

●Bring sample ORP into the

correct measuring range.

●Bring sample temperature

into the

correct measuring

range.

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