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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Digital MultiMeter with a Voltage Beeper
Hi,
I am looking to buy a DMM that has a BEEPER when a voltage (AC or DC) occurs above a preset threshold. Example: With this DMM hooked up to a circuit, if the voltage rises above 12VDC (example), the DMM will BEEP. Does anyone know of such a DMM? Please include make and model number. Thank You in advance, John |
#3
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Digital MultiMeter with a Voltage Beeper
I am looking to buy a DMM that has a BEEPER when a voltage (AC or DC)
occurs above a preset threshold. Example: With this DMM hooked up to a circuit, if the voltage rises above 12VDC (example), the DMM will BEEP. I don't know of any such device that resembles the common DVM/DMM. However, the industrial control market is full of DPM (digital panel meters) and battery monitors that have alarm outputs. When the display voltage gets out of range, either too high, or too low, it closes a relay. Since your application isn't particularly critical and precision isn't important, something from China or surplus should suffice. Some examples: https://www.ebay.com/itm/LED-Display-Panel-Digital-Voltmeter-w-Alarm-Indicator-3-Way-DC-0-99-9V-Red/253074549230 https://www.ebay.com/itm/DA8-RRB-Digital-Sensor-Meter-2-Relay-Alarm-Output-4-digit-LED-Display-D7K0/133289489539 https://www.ebay.com/itm/Universal-Battery-Alarm-Panel-Meter-4-50VDC-33991-ME/322938101800 https://www.ebay.com/itm/1-H-P-Edge-Taunt-Band-Panel-Meter-Model-6403-wt-Low-High-Alarm-settings-0-300/312554778647 https://www.ebay.com/itm/Battery-Monitor-6in1-VOLT-AMP-AH-Time-Power-Protection-Alarm-Buzzer-DC-200V-300A/153388652680 etc... You might also consider building such a device using a "window comparator" or "window detector" circuit. https://en.wikipedia.org/wiki/Window_detector http://www.learningaboutelectronics.com/Articles/Window-comparator-circuit.php etc... Hi, I should have mentioned that it is important to have a high impedance (virtually no loading effect). A DMM may have 10M ohms. John |
#4
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Digital MultiMeter with a Voltage Beeper
On 2020/01/10 1:01 p.m., wrote:
Hi, I am looking to buy a DMM that has a BEEPER when a voltage (AC or DC) occurs above a preset threshold. Example: With this DMM hooked up to a circuit, if the voltage rises above 12VDC (example), the DMM will BEEP. Does anyone know of such a DMM? Please include make and model number. Thank You in advance, John I rather like the Mooshimeter - which will do a log of various measurements to your phone, computer, or its own internal memory card... https://moosh.im/ It is a great tool! John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
#5
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Digital MultiMeter with a Voltage Beeper
wrote:
Hi, I am looking to buy a DMM that has a BEEPER when a voltage (AC or DC) occurs above a preset threshold. Example: With this DMM hooked up to a circuit, if the voltage rises above 12VDC (example), the DMM will BEEP. Does anyone know of such a DMM? Please include make and model number. Thank You in advance, John I was thinking my Tripplet/B&K might have a relay function. It's a bench multimeter. Would have to investigate. Greg |
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