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Brymen 257S lost calibration data

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GAVER:

1)   Turn Rotary Knob to "OFF" position.
2)   Press and hold "SELECT" and "HOLD" buttons, and then turn "Rotary Switch" from "OFF" to "" function position within one second.
3)   "000.0" is displayed
4)   Input 000.0, press "SELECT" and then "REL" buttons simultaneously
5)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
6)   “300.0” is displayed
7)   Input 300.0, press "SELECT" and then "REL" buttons simultaneously
8)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
9)   “3.000k” is displayed
10)   Input 3.000k, press "SELECT" and then "REL" buttons simultaneously
11)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
12)   “30.00k” is displayed
13)   Input 30.00k, press "SELECT" and then "REL" buttons simultaneously
14)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
15)   “300.0k” is displayed
16)   Input 300.0k, press "SELECT" and then "REL" buttons simultaneously
17)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
18)   “3.000M” is displayed
19)   Input 3.000M, press "SELECT" and then "REL" buttons simultaneously
20)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
21)   “30.00M” is displayed
22)   Input 29.80M, press "SELECT" and then "REL" buttons simultaneously
23)   Wait till reading is stable, press "SELECT" and then “HOLD” buttons simultaneously.
24)   Turn to OFF to terminate the calibration

Attached is the procedures to calibrate BM257 resistance function. If the problem of your unit is only for 600 OHM range, you may turn meter off right after proceeding with "Procedure 8th". Please be careful. Wrong calibration operation may lead to ..... .   

GAVER:
Technical support Brymen is very good,  feel free to contact

Hydrawerk:

--- Quote from: Sjokolade on November 20, 2015, 04:48:41 pm ---Turned on my 257s today and (...)
Display now shows a 'C_Er' error for a second or two every time I turn meter on.

--- End quote ---
How often does this calibration error appear on BM257s?? How many people have experienced this? Does it appear even at other Brymen multimeters?
I have a BM829s from 2016 and there are no problems.

EEVblog:

--- Quote from: Hydrawerk on August 05, 2023, 11:40:06 pm ---
--- Quote from: Sjokolade on November 20, 2015, 04:48:41 pm ---Turned on my 257s today and (...)
Display now shows a 'C_Er' error for a second or two every time I turn meter on.

--- End quote ---
How often does this calibration error appear on BM257s?? How many people have experienced this? Does it appear even at other Brymen multimeters?
I have a BM829s from 2016 and there are no problems.

--- End quote ---

I have never had a report of a calibration issue on any BM235 or BM786

Hydrawerk:
Thank you. It was probably a (rare?) problem back in 2015 and does not appear today.

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