Technisches Laboratory Verkaufshandbuch technical Laborgeräte sales manual

Contents LKPv and LGPv laboratory appliances with Profi electronic controller Alarm, memory and safety functions 03 Temperature, door opening and power failure alarms 03 Internal system alarms 03 Internal memory functions 04 Special safety functions 04 Temperature and alarm documentation 05 External temperature and alarm monitoring connections 05 External alarm contact connection 07 Product temperature monitoring connection 08 Safety feature table 09 Temperature consistency and distribution according to EN 60068-3 10 Description of the EN 60068-3 test procedure...

LKPv and LGPv laboratory appliances with Profi electronic controller Alarm, memory and safety functions Liebherr MediLine refrigerators and freezers with Profi electronic controller help to protect your inventory. These cabinets offer a variety of alarm, memory and safety features designed to greatly reduce the risk of loss of contents. Temperature, door opening and power failure alarms High and low temperature alarms All LKPv and LGPv models have integrated high and low internal air temperature alarms with both audio and visual signals. The factory settings for the alarm limits are + 3 /– 2 K in...

LKPv and LGPv laboratory appliances with Profi electronic controller Internal memory functions Internal alarm memory This function stores to memory details of the last 30 alarms: time and date of the start and the end of the alarm condition, the type of the alarm condition and the maximum and minimum internal air temperatures measured during this alarm condition period are registered. Internal temperature memory This function stores to the memory the internal temperature profile at 4-minute intervals. 2800 temperature logs are stored to memory, which corresponds to approximately a 7-day logging...

LKPv and LGPv laboratory appliances with Profi electronic controller Temperature and alarm documentation Liebherr MediLine refrigerators and freezers with Profi electronic controller help to protect your inventory. The appliances offer a variety of features and options that are specifically designed to allow remote monitoring of interior temperatures, product temperatures and alarm events, in order to provide comprehensive documentation of the storage conditions. External temperature and alarm monitoring connections Infrared interface and optional infrared key All LKPv and LGPv models have an integrated...

LKPv and LGPv laboratory appliances with Profi electronic controller RS 485 interface and optional signal converter All LKPv and LGPv models have an RS 485 interface. If an RS 485 monitoring system is not already in place, a converter kit is available as an optional extra to convert the RS 485 signal to an RS 232 signal and allow connection to a PC or laptop. The RS 485 bus connection is made using standard shielded data cables, e.g. type LiYCY 2 x 0,14 mm2. The maximum possible length of the data lines depends on the quality of the components used. The maximum range is 500 m. A maximum of 20...

LKPv and LGPv laboratory appliances with Profi electronic controller External alarm contact connection Volt-free contact All LKPv and LGPv models have an integrated volt-free contact. The relay contact can be wired into a warning system in the building which would advise e.g. security personnel or a janitor outside of working hours. Warning systems with audio or visual alarms are possible. The following example shows a circuit with a visual alarm. Either normal operation or alarm condition or both can be indicated. Either AC or DC circuits are possible, max. AC 230 V / 5 A. Example: visual alarm...

LKPv and LGPv laboratory appliances with Profi electronic controller Product temperature monitoring connection Interface for optional NTC product temperature probe All LKPv and LGPv models have an integrated interface for connecting an optional available NTC product temperature probe to the Profi electronic controller. The controller can be set to display either the internal air temperature, as registered by the air probe or the temperature registered by the product probe or both. Also the temperature alarm limits as well as the temperature alarm delay for the product temperature probe can be adjusted...

LKPv and LGPv laboratory appliances with Profi electronic controller with Profi electronic controller

LKPv and LGPv laboratory appliances with Profi electronic controller Temperature consistency and distribution according to EN 60068-3 The Liebherr laboratory cabinets are all tested in-house to the EN 60068-3 test procedure. The measurement results for the appliance setups can be found in the results section. Please note the measurements are for the specific appliances tested and are for reference only. Liebherr’s development facility is certified to ISO 17025 (general requirements for the competence of testing and calibration laboratories). Description of the EN 60068-3 test procedure The general...

LKPv and LGPv laboratory appliances with Profi electronic controller Cabinets are tested empty over a period of 24 hrs including defrost cycles. Test criteria for characterising the temperature consistency and distribution 1) Gradient or homogeneity: “The gradient HѲ is the maximum difference, obtained in an achieved environment, between the mean values of measurements Ѳmj increased by their expanded uncertainty U mj, within the working space during the measurement time.” Gradient: “Distribution of temperatures within the chamber” HѲ = max (Ѳmj + Umj ) - min (Ѳmj - Umj ) max = (mean value warmest...

LKPv and LGPv laboratory appliances with Profi electronic controller 2) Fluctuation: “The characterisation of the temperature fluctuation within the working space enables to determine the variation in maximum temperature at a measurement point of the working space during the measurement time.” Fluctuation of the point SѲ j: The difference between the maximum and minimum values measured at point j during the duration of measurements Maximum fluctuation, SѲ M : Maximum value of all fluctuation values SѲ j during the duration of measurements Example: Fluctuation Sensor with greatest difference