Hampshire Controls LD-215 User Instructions

1 Grove St. Dover, NH 03820 (603) 749-9424 or Toll Free US/Canada (866) 496-9424 www.hampshirecontrols.com LD-215 Liquid Nitrogen Level Sensor User Instructions Overview of Operation The LD-215 uses a cryogenic RTD to sense the surface of liquid nitrogen by monitoring the self-heating of the probe. The alarm will sound and the output ...

Setting the Mute and Delay Periods Setting Value Mute Time (min) To set the mute time, hold the “MUTE” button until the “ALARM” LED begins a quick flash sequence. After the LED goes out, tap the “MUTE” button the desired setting count, between 1 and 6 taps, after a pause the “ALARM” LED will flash the new setting. A single long pulse s ...

Battery Insert the included batteries in the compartment at the back of the unit, please note the polarity. The LD-215 uses two rechargeable 1.2V NiMH AA cells for backup, and can run more than 24 hours on battery power. The batteries are continuously charged while the device is powered by the AC adapter. If AC power is lost for an extended period and ...